Extracorporeal shock wave lithotriptor for the maintenance of common failures

Electrohydraulic lithotripsy machine, mainly for the treatment of urinary tract stones. It is the use of electrodes attached to the first focus ellipsoidal cavity on the therapeutic unit for underwater high-voltage pulse discharge, causing an explosion shock formation, this shock wave ellipsoidal reflector wall, focused on the second focus of the stones, stones in focus under repeated action of the shock wave, gradually crumbled into small particles hit 1 ~ 3mm in diameter, and then excreted in the urine, gravel to achieve the purpose of treatment. Now make a brief presentation on the common faults and repair the machine appear during use.

Fault 1: Press the water, drainage key, not into the drainage.
(1) Check the feed pump, drain pump is working and measure the presence or absence of operating voltage or burned;
(2) Check the inlet valve and drain valve is working and clogged debris inside the solenoid valve so that it does not work;
(3) whether or not filled in the water tank inspection, whether there is air to enter into the pump, causing the pump idle, not water;
Whether there is debris clogging, resulting in poor drainage within
(4) Check the filters.



Failure 2: Press the button to prepare a high pressure, can not be boosted.
(1) Check whether the regulator servo motor operation, with or without mechanical stuck or burned;
If (2) Check the boost limit switch is damaged and can not be reset closed;
(3) Check the booster relay is working, the contact is good contact;
(4) Check whether the charge resistor open circuit, the wiring connections are good.

Fault Three: Press the key manually or automatically, you can not shelling.
(1) Check the high voltage transformers, high voltage silicon stack, high voltage capacitor is damaged, whether the high voltage output;
(2) Check the trigger circuit trigger capacitor, SCR, high-voltage transformer and a current limiting resistor which for damage;
(3) Check the high voltage switch two spherical discharge it because of long working hours and the oxidation or the gap is too large, resulting not trigger discharge;
(4) Check the vacuum relay is working, the contact is good contact;
If (5) Check the electrode and the electrode pads fully contact the phenomenon of electrode wiring for breaks between the seat and the high-voltage switch.

Fault 4: Sideswipe phenomenon blasting process.
(1) Check whether the bladder tighten its O-ring is aging, causing air to enter;
(2) Check the electrode and the electrode holder whether the maximum compression, the elastic O-ring on the electrode is good;
Check the intake and exhaust nozzle leaks, its pipeline without aging generated leakage.

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